Subsea Inspection Programs

Close Visual Inspection

A Close Visual Inspection (CVI) will be conducted on nominated areas for detailed inspection requirements. A CVI requires more cleaning than a GVI which is usually completed using a wire brush, HP water cleaning or grit blasting to achieve a bright metal finish. This type of inspection is typically used for inspecting welds, corrosion and cracking. A CVI will generally be recorded using high definition video however, high quality stills can also be used.

Petroleum Asset Inspections

Dive Works specialises in providing ROV inspections for the Oil and Gas industry. With extensive experience in working from the treacherous waters of Bass Strait to the calmer conditions off the coast of Western Australia and in PNG, Dive Works has conducted many offshore inspections tailored to suit the needs of the industry.

Using the latest equipment, our innovative methods enable Inspection Class ROVs and highly skilled pilots to do the job of Workclass ROVs, slashing costs and mobilisation/demobilisation time frames.

Regulatory Inspections of Subsea Assets

Utilising both the Observation Class and Work Class ROVs, Dive Works can conduct routine underwater structural inspection, repair and maintenance programs on various subsea assets such as Oil and Gas Platforms, pipelines, well heads, EFL’s, HF’s, production lines, umbilicals etc.

IRM includes flooded member detection services (FMD), Cathodic Protection (CP) and Underwater Thickness (UT) readings.

General Visual Inspection

A General Visual Inspection (GVI) is an overview inspection to determine the general condition of a structure or component. A GVI will identify gross damage, debris, and major anomalies in the form of video footage with verbal commentary. A GVI is generally conducted from within 1m of the subject with a single pass being sufficient for most structures. In the case of a pipeline GVI, a pipeline skid is used, enabling multiple camera angles to be recorded. Dive Works records all footage using Digital Edge eventing software. For most GVIs the observation class ROV is utilised as it is smaller and able to navigate complex structures or restricted areas easier.

Pipeline Inspections

When pipeline surveys are required, Dive Works ROV systems have a tooling skid with boom arm that have cameras and lighting to capture the whole pipeline, checking for free spans and any anomalies on or near the pipe line. Able to detect damage, defects, leaks, erosion and movement, each pipeline is carefully inspected and its condition assessed.  Where the pipeline goes into 100% burial the ROV with the assistance of the pipe tracker, will track the pipeline and its burial depth, until such time the pipe line comes back out of burial.

Using sonar, along with the ROVs, our Pilots and Technicians carefully check all underwater features. As the ‘flight’ is recorded, stakeholders, engineers and scientists can review the footage as often as required. Compact and non invasive, the ROVs can fly close to the seabed without disturbing sediment.

Dive Works methods ensure any downtime is minimised. Once the pipeline(s) have been inspected, Dive Works provide a detailed condition report including photos and/or video evidence so that Clients can assess the requirements to enable asset protection and to prolong asset life.

Reservoir and Dam Inspections

Dive Works can perform routine and emergency inspections in reservoirs and dams with the Seaeye Falcon ROV systems, inspecting underwater constructions, intake structures, repairs and obstructions.

The ROV is also effective for inspecting large water tanks. The ROV swims through the tank and surveys the roof, seams, standpipes, and cables. The camera eye captures footage while robotic grippers take samples of corrosion. Sending divers into drinking water tanks has long been the practice for inspecting these structures. But it is dangerous and can pose health risks. Now, town and city engineers can make use of the Dive Works ROVs to make tank inspections safer, more affordable and more frequent.

Aquaculture Net & Mooring Inspections

Dive Works provides fish net and mooring inspections using the Saab Seaeye observation class ‘Falcon’ ROV. Operating up to 300 metres deep the ROV can capture live video of the installation process of new fish farm leases as well as ongoing and routine maintenance. Requiring only two personnel to operate, the ROV system is a safe and cost effective alternative to using commercial divers.

Services include installation inspections, mooring system inspections, net inspections, lease surveys (seabed and site). A full report including high definition video is provided to ensure you receive a comprehensive record of the inspection.

Offshore Diver Support

Dive Works recognises the value that commercial divers bring to projects however we are also well aware of the limitations and risks associated with deploying divers in conditions where access, visibility and depth compromise safety and investigative quality. With the use of the Seaeye Falcon ROV and its positioning and imaging technology, Dive Works can provide safe, economical, accurate and more detailed sub sea solutions.

get in touch

Dive Works is Australia’s leading technology based subsea solutions provider, utilising a fleet of world class Remote Operated Vehicle’s (ROVs) and experienced  ROV pilots/technicians.

We deliver innovative services in Inspection, Maintenance and Repair (IMR), Subsea Survey’s and Rapid Emergency Response for subsea assets. The sectors we service include Oil & Gas, Water Authorities & Government, Marine, Engineering & Construction throughout Australia and South East Asia.

head office

46B Access Way, Carrum Downs Victoria, Australia 3201

PO BOX 63, South Hobart
Tasmania, Australia 7004

Australia: 1300 586 400

+61 3 9708 2632

[email protected]